rudbaekinvest.dk is a .dk domain served by 2 nameservers (aliza.ns.cloudflare.com, anirban.ns.cloudflare.com). It was registered on 31 January 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.4.14 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.pub.mailpod5-cph3.one.com, mx2.pub.mailpod5-cph3.one.com and 1 more. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 104.21.4.14 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.223.242 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.pub.mailpod5-cph3.one.com | 185.164.14.54 | mx1.pub.mailpod5-cph3.one.com | AS51468 One.com A/S |
| 10 | 300s | mx2.pub.mailpod5-cph3.one.com | 185.164.14.55 | mx2.pub.mailpod5-cph3.one.com | AS51468 One.com A/S |
| 10 | 300s | mx3.pub.mailpod5-cph3.one.com | 185.164.14.56 | mx3.pub.mailpod5-cph3.one.com | AS51468 One.com A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:40e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::ac43:dff2 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.4.14,172.67.223.242 ech=AEX+DQBBGQAgACC7m7JCpWgK1VLIlROWlFWgUBgD0lBQhZRSiMF+gGkqWAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:40e,2606:4700:3032::ac43:dff2 |
| TXT Record |
|---|
| Name: _acme-challenge TTL: 60 or Lowest possible value Value: AgyHERf0LS9d-bj172cKa51murck5WiGGmZk3E7nlTg |
| Name: _acme-challenge.www TTL: 60 or Lowest possible value Value: _j_KJ9qXyXfaMT8zPODk_aN9tkq8hnxtXEdxy8J8zFE |
| www | 104.21.4.14 172.67.223.242 2606:4700:3032::6815:40e 2606:4700:3032::ac43:dff2 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network rudbaekinvest.dk: 104.21.4.14 172.67.223.242 2606:4700:3032::6815:40e 2606:4700:3032::ac43:dff2 (AS13335) www.rudbaekinvest.dk: 104.21.4.14 172.67.223.242 2606:4700:3032::6815:40e 2606:4700:3032::ac43:dff2 (AS13335) |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rudbaekinvest.dk | -msCDcMrs9gnffL7GJBUSAxZWuF1UO2Lt0X_yfY5Hbo |
| TXT | _acme-challenge.rudbaekinvest.dk | sHHmGn2W-PeF4SsfKhteKmmg4tUIflxxUlriTR8QrEU |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod5-cph3.one.com | DANE-EE · SPKI · SHA-256 | 05A6C261F69F69606097350AD7D47EB8… |
| SMTP _25._tcp.mx2.pub.mailpod5-cph3.one.com | DANE-EE · SPKI · SHA-256 | 05A6C261F69F69606097350AD7D47EB8… |
| SMTP _25._tcp.mx3.pub.mailpod5-cph3.one.com | DANE-EE · SPKI · SHA-256 | 05A6C261F69F69606097350AD7D47EB8… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2417744623 |
| Primary NS (MNAME) | aliza.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2018-01-31 |
| Expires | 2027-01-31 (102d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-18 11:40:18 shown | 647ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-17 11:19:55 | 4077ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-16 11:17:10 | 1424ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-14 08:18:11 | 3620ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-13 07:05:34 | 529ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-12 03:12:24 | 1444ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-30 16:10:50 | 587ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-25 15:34:49 | 2642ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-22 20:49:12 | 618ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-14 04:14:04 | 843ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-07 01:53:23 | 809ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-14 16:54:46 | 8928ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 11:56:50 | 674ms | 2 NS 1 A 4 MX | 🔒 Secure |